TP-Link TL-SL5428E User Guide - Page 161

TL-SL5428E 24-port 10/100Mbps + 4-port Gigabit L2 Managed Switch CLI Guide Chapter 26 MSTP Commands MSTP (Multiple Spanning Tree Protocol), compatible with both STP and RSTP and subject to IEEE 802.1s, can disbranch a ring network. STP is to block redundant links and backup links as well as optimize paths. spanning-tree global Description The spanning-tree global command is used to configure STP globally. To return to the default configuration, please use no spanning-tree global command. Syntax spanning-tree global [state { disable | enable }] [mode { stp | rstp | mstp }] [cist cist] [htime hello-time] [mage max-age] [delay forward-delay] [hcount hold-count] [mhop max-hops] no spanning-tree global Parameter state -- Enable/ Disable STP function globally. By default, it is disabled. mode -- STP Version. There are three options, including SRP (Spanning Tree Protocol), RSTP (Rapid Spanning Tree Protocol) and MSTP (Multiple Spanning Tree Protocol). By default, the STP version is STP. cist -- CIST Priority, which must be multiple of 4096 ranging from 0 to 61440. By default, the CIST priority is 32768. CIST Priority is an important criterion on determining the root bridge. In the same condition, the switch with the highest priority will be chosen as the root bridge. The lower value has the higher priority. hello-time -- Hello Time, which is the interval to send BPDU packets, and used to test the links. Hello Time rangs form 1 to10 in seconds and it is 2 by default. Otherwise, 2 * (Hello Time + 1) = Max 149